Re: [ccp4bb] Suggestions to improve resolution of protein crystals

2021-03-21 Thread Thomas, Leonard M.
After taking images at room temp and assuming good diffraction then, I would kick up the PEG400 concentration and as a first go on the PEG400 condition and try low molecular weight PEG's as a cryo protectant for the other two conditions. Good Luck, been there and have exposed many crystals in

Re: [ccp4bb] Suggestions to improve resolution of protein crystals

2021-03-21 Thread Saurabh Upadhyay
Dear Everton and Nukri, Thank you for your kind reply, we were also speculating that there could be some issues with cryoprotection. We have used two cryoprotectants naming; Parabar (10312) and Paraffin Oil from Hampton Research company. We have also used glycerol and respective mother liquors

Re: [ccp4bb] Suggestions to improve resolution of protein crystals

2021-03-21 Thread Nukri Sanishvili
Dear Saurab, It's a shame these crystals do not diffract well - they look so good! I assume the diffraction you saw was recorded at cryo temperatures? If so, it is possible that you may be damaging the crystals during cryo-pretection and cryo-cooling. Before you go too deep into changing the

Re: [ccp4bb] Suggestions to improve resolution of protein crystals

2021-03-21 Thread Éverton
Dear Saurabh, Your crystals are gorgeous! Which cryoprotectant did you use? Best, Everton. Sent from my iPhone > On Mar 21, 2021, at 11:04 AM, Saurabh Upadhyay > wrote: > >  > Dear All, > > I am trying to crystalize a protein, which occurs in monomeric (60kDa) and >